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Finding the Fourth Proportional to 122,772, 169,433.92 and 69,062.16

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Solution

The fourth proportional to 122,772, 169,433.92 and 69,062.16 is: 95,310.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,772 : 169,433.92 = 69,062.16 : x
  2. Step 2: Convert to fraction form
    122,772/169,433.92 = 69,062.16/x
  3. Step 3: Cross multiply
    122,772x = 169,433.92 × 69,062.16
  4. Step 4: Simplify right side
    122,772x = 11,701,472,492.47
  5. Step 5: Solve for x
    x = 11,701,472,492.47/122,772
  6. Step 6: Final answer
    x = 95,310.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.